Clean fingers
Perhaps the best feature, according to many users. Gone are the dirty fingers always associated with metallographic sample preparation.
Abraded material is always deposited at the edge of a preparation surface, where you get it on your fingers while changing the surface. The rounded edge of Aka-Ronan makes it possible to clean the edge, while the disc is still rotating.
Keep a piece of paper towel pressed against the edge while the disc is rotating. The now clean Aka-Allegran can be lifted of, without getting dirty fingers.
On to environment